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Looped optical-frequency detection apparatus of resonance type micro-light electromechanical gyro

A micro-optical electromechanical and detection device technology, applied in the direction of measuring devices, Sagnac effect gyroscopes, instruments, etc., can solve the problems of poor linearity of scale factor, small dynamic test range, low detection sensitivity, etc., and achieve measurement Large range, high detection accuracy and good linearity

Inactive Publication Date: 2006-10-25
BEIHANG UNIV
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Problems solved by technology

[0005] At present, for resonant micro-optical electromechanical gyroscopes, most of them adopt open-loop detection schemes, which have low detection sensitivity, gyroscope accuracy is affected by the stability of the light source output wavelength and optical power stability, the dynamic test range is small, and the linearity of the scale factor is poor.

Method used

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  • Looped optical-frequency detection apparatus of resonance type micro-light electromechanical gyro
  • Looped optical-frequency detection apparatus of resonance type micro-light electromechanical gyro
  • Looped optical-frequency detection apparatus of resonance type micro-light electromechanical gyro

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The invention is a closed-loop optical frequency detection device suitable for resonant micro-opto-electromechanical gyroscopes. The closed-loop optical frequency detection device (see figure 1 shown) is composed of a central processing unit (FPGA+DSP), a signal acquisition unit A, a signal acquisition unit B, and a control signal generation unit.

[0022] The circuit structures of the signal acquisition unit A and the signal acquisition unit B are the same,

[0023] The control signal generating unit includes a ladder wave generating circuit for controlling the first phase frequency shifter, a ladder wave generating circuit for controlling the second phase frequency shifter, and a voltage conversion circuit for controlling the light source, for controlling The ladder wave generating circuit of the first phase frequency shifter has the same structure...

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Abstract

The invention discloses a resonant glimmer electromechanical closed loop optical frequency detecting device that is made up of CPU, signal acquisition unit A, signal acquisition unit B, and control signal generating unit that includes the step wave generate circuit, and voltage conversion circuit. The light intensity signal would be amplified, and filtered and transmitted to FPGA processor. The two digital signal would output wave length signal after processed to make intervene light intension be constant at resonant point. The CPU receives the signal and output two signals, and one is adjusting the frequency of first phase mover, and the other output constant step wave to the second phase frequency mover.

Description

technical field [0001] The invention relates to a detection device for processing the output signal of an angular velocity sensor, in particular to a detection device suitable for the output signal of a resonant micro-opto-electromechanical gyroscope. The resonant micro-optical electromechanical gyroscope uses the SAGNAC effect generated by the angular velocity of the carrier to change the frequency difference between the clockwise transmitted light and the counterclockwise transmitted light, and the angular velocity of the carrier can be indirectly measured by measuring the frequency difference. Background technique [0002] Optical gyroscopes are based on the Sagnac effect. In inertial space, the Sagnac effect can usually be described as: "In the same closed loop, two The rotation of a beam of light around an axis perpendicular to the loop will cause a change in the phase difference between the two beams, and the magnitude of the phase difference is proportional to the rot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C19/64G01C19/66G01C25/00
Inventor 冯丽爽张春熹马迎建刘惠兰林恒杨德伟刘恒贺斌许光磊
Owner BEIHANG UNIV
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